#

# Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description: 

#

import sys, re, os, os.path, fnmatch

# This utility reads a compilation log file, and writes last 50 lines up to error 

# to an output tail file. If no errors, then file is not written

RE_ERROR = re.compile(r"fatal error|Build FAILED|make(\.exe)?(\[[^]]+\])?: \*\*\* .+ (Error [0-9]+|Stop\.)|.+[0-9]+: error:|status exit='failed'|<error>.*</error>|<center>[1-9]*</center></td><td><center>High</center>")

def errortail(logfile, tailfile, tailLines = 50):

    tail = []

    for line in open(logfile).readlines():

        tail.append(line.rstrip())

        if (len(tail) > tailLines):

            del tail[0]

        if RE_ERROR.search(line):

            tail = tail[-50:]

            open(tailfile, "w").write("\n".join(tail))

            return

def main():

    if len(sys.argv) != 3:

        print "Usage: %s <build log file> <tail output file>" % sys.argv[0]

        sys.exit(1)

    errortail(sys.argv[1], sys.argv[2])

if __name__ == "__main__":

    main()